Loom shuttle-tension mechanism.



M. GAMAGNI.

LOOM SHUTTLE TENSION MECHANISM.

APPLICATION 11mm 111m: 211, 1910.

990,334. 1 Patented Apr. 25, 1911.

WITNESSES:

Ema/m THE NORRIS PETERS cm, WASHINGTON. a. c.

UNTTEE STATE PATENT @FFTQE.

MARIO CAMAGNI, OF PATER-SON, NEW JERSEY.

LOOIVI SHUTTLE-TENSION MECHANISM.

Application filed June 28, 1910.

To all whom it may concern:

Be it known that I, MARIO CAMAGNI, a citizen of the United States,residing in Paterson, Passaic county, New Jersey, have invented acertain new and. useful Improvement in Loom Shuttle-Tension ltlechanisms; and I do hereby declare the following to be a full, clear,and exact description of the invention, such as will enable othersskilled in the art to which it appertains to make and use the same,reference being had to the accompanying drawing, and to letters ofreference marked thereon, which form a part of this specification.

In a well-known type of tension mecha nism for shuttles for looms one ofthe threadcontrolling parts is a spring-actuated device comprising aseries of eyelets arranged parallel and in alinement with each other andrigidly connected together, such member being usually formed by twistinga length of wire so as to form loops (constituting the eyelets) atsuitable intervals. Being all of metal, one or more of the eyeletssooner or later becomes cut partially or entirely through by theconstant wear of the thread thereon, so that the device as a whole mustbe discarded and replaced by a fresh one. One adaptation of a device ofthe kind referred to may, for illustration, be seen upon reference tothe U. S. Patent to Faisent ct aZ., No. 492395.

The object of my invention is principally to improve the device referredto by prolonging the life thereof.

In the accompanying drawing, in which the invention is fullyillustrated, Figure 1 illustrates a fragment of a loom shuttle, a partof which is broken away to reveal the subject of the invention; Fig. 2is a sectional view on the line a-.r of Fig. t; Fig. 3 is a similarview, illustrating a slight modification; Fig. 4 is an enlarged view,partly in side elevation and partly in section. of the improved device;Fig. 5 is a plan view, also enlarged, of the improved device, theeyelets being removed; Fig. 6 shows the blank from which theholder-member of the device is formed; Figs. 7, 8 and 9 are side, planand end views of the supporting member; Fig. 10 is a plan view of ablank from which a modified form of the device is made; and. Fig. 11 isa side elevation of the modified form of the device which results whenthe Specification of Letters Patent.

Patented Apr. 25, 1911. Serial No. 569,309.

blank in Fig. 10 has been converted to its ultimate form, the eyeletsbeing omitted.

In the shuttle a shown in Fig. 1, 7) is the improved device and 0 aseries of fixed guides which coact with the eyelets of the device Z) topreserve the proper tension on the thread (Z, the device 6 beingcontrolled by the usual elastic band or the like 6 so that it normallytends to stand as in said figure.

In its preferred form, the improved device comprises a supportingmember, Figs. 7, 8 and 9, a holder-member, Figs. 2, 3, at and 5, and aplurality of eyelets, Figs. 2, 3 and at.

The supporting member is formed from a piece of wire so as to produce astraight shank f, a coil 9 at one end of said shank and a projection hextending from the coil. The coil 9 affords a bearing for the supportingmember on the pivot 2' shown in Fig. 1, while the projection it servesas a means to which to attach the elastic band 6 (Fig. 1).

The holder-member is formed from the blank of sheet metal shown in Fig.6, the same comprising a strip from which project at regular intervalsthe pairs of ribs 7 (the ribs in each pair being alined and extending inopposite directions from the strip) and, between the ribs, the opposedprojecting nibs Z at one end substantially rectangular butt m is formedin the strip. Each rib is is also formed channeled longitudinallythereof.

From theblank thus produced the holder member is formed as follows: Thestrip, including its nibs Z and its butt m, is bent into the form of atubular shank n (Fig. 5), the extremities of corresponding nibs Z andthe sides of the butt at being brought into approximate contact witheach other, as shown in Fig. 5; each pair of ribs 70 (previouslychanneled or recessed in the manner described) is then bent so as toproject upwardly from the'shank n and stand, when seen in the endelevation of the holder-member, in the line of a circle, therebyproducing gripping devices 0 (or said ribs may be so bent as to stand inthe line of an ellipse, Fig. The holder-member may now be assembled withthe supporting member by introducing the shank f of the supportingmember into the tubular shank m of the holder member (see Fig. 4:).

The eyelets 79 (having the circular form in Fig. 2 or the ellipticalform in Fig. 3) are composed preferably of some hard substancecalculated to resist wear, say glass or any other vitreous substance orthe like which is commonly used in the manufacture of thread-guidingeyelets. They are introduced in the sockets formed by the grippingdevices, each being held in a pair there of, seated in the channels orrecesses of said gripping devices.

In the modification shown in Figs. 10 and 11 the parts (1, r, s and t ofthe blank correspond in. form and arrangement to the parts j, is, Z andm in Fig. 6, and when the blank is shaped to form the holder-member theparts a and 1) corresponding to the parts a and 0 in Figs. 8, 4t and 5result. A rectangular extension, 10, however, projects from the end ofthe strip 9 having the butt t, said extension having a transverse slit yand a tongue 2, the latter projecting from the free end of theextension. To form the bearing for the improved device in this instance,the extension w is bent into the coil 2 in Fig. 11, its tongue 2 beingpassed through the slit y and extending therefrom to produce theprojection 3 to which the band 6 may be attached.

As the results of the construction of the device as herein described,the life of each eyelet is very materially increased because, being ofglass or other similar hard substance, it resists wear more effectivelythan the metal eyelets of the old type of the device; moreover, when theeyelet does wear to such an extent that it is no longer serviceable, theeyelet may be removed from the holder-member and a new one substituted.

It will be observed that the ends of the devices 0 are in each instancespaced from each other; thus, at the thread-contact portion of eacheyelet no metal exists which in the whipping of the filling incident toits discharge from the shuttle when the latter is in action would becomeout or nicked and lead to an unexpected failure of feed of the fillingand consequent damage to the cloth being woven.

Having thus fully described my invention, what I claim as new and desireto secure by Letters Patent is:

1. In a tension mechanism of substan tially the nature of that hereindescribed, the combination of a plurality of eyelets and a holder memberfor the eyelets consisting of a sheet metal strip having parallel pairsof oppositely projecting ribs extending laterally therefrom, said ribsbeing bent up into gripping relation to the eyelets, substantially asdescribed.

2. In a tension mechanism of substantially the nature of that hereindescribed, the combination of a plurality of eyelets and a holder memberfor the eyelets consisting of a sheet metal strip having parallel pairsof oppositely projecting ribs extending laterally therefrom, said ribsbeing bent up into peripheral gripping relation to the eyelets,substantially as described.

In a tension mechanism of substan tially the nature of that hereindescribed, the combination of a plurality of eyelets and a holder memberfor the eyelets consisting of a sheet metal strip having parallel pairsof oppositely projecting channeled ribs extending laterally therefrom,said ribs being bent up into gripping relation to the eyelets andreceiving said eyelets in their channels, substantially as described. I

i. In a tension mechanism of substantially the nature of that .hereindescribed, the combination of an eyelet and a holder member for theeyelet consisting of a sheet metal strip bent longitudinally intosubstantially tubular form and having oppositely project ing ribs, saidribs being bent up into gripping relation to the eyelet, substantiallyas described.

In testimony, that I claim the foregoing I have hereunto set my handthis 27th day of June, 1910.

MARIO GAMAGNI.

Witnesses JOHN IV. STEWARD, WM. D. BELL.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents.

Washington, D. C.

